【摘要】 目的:应用有限元法分析不同屈曲角度下胫、股骨关节软骨、半月板的生物力学特性以指导临床工作。方法:基于正常成人志愿者MRI数据建立全膝关节有限元三维模型,通过对模型施加350 N垂直载荷,模拟分析不同屈曲角度下胫、股骨关节软骨、半月板的应力值,并分析结果。结果:在屈曲0°、30°、60°、90°时,关节软骨和半月板各有一个应力集中部位,且半月板和胫骨平台软骨的最大应力值均大于股骨髁软骨。结论:胫骨平台软骨和半月板是主要的承重结构,运动损伤和关节退变好发于胫骨平台软骨和半月板,与此处应力较大有关。更多还原

【Abstract】 Objective To analyze the biomechanical features of the tibial,femoral and meniscal articular cartilage at different angles of knee flexion. Methods The knee three-dimensional finite element model was constructed based on the MRI image of a healthy adult volunteer. The stresses on the model were detected at 0°,30°,60°,and 90° of knee flexion under a vertical load of 350 N. Results At 0°,30°,60°,and 90° of knee flexion,the maximum stress on articular cartilage and meniscus was concentrated on the region of the medial femoral condyle and lateral meniscus. The maximum stress value on meniscus and tibial plateau cartilage was greater than the cartilage of femoral condyle. Conclusion Cartilage of meniscus and tibial plateau serve as the main loading-bearing structures during knee flexion with loading and thus are vulnerable to sports injury and joint degeneration.更多还原